| 单词 | set square |
| 释义 | > as lemmasset square set square n. (a) a plate of wood, metal, etc. in the form of a right-angled triangle, the acute angles being either 60° and 30° or both 45°, used by draughtsmen as a guide for drawing lines at one of these angles; (b) a form of T-square with an additional arm turning on a pivot, for drawing lines at fixed angles to the head; (c) a joiner's square. ΘΚΠ society > occupation and work > equipment > equipment for marking out work > [noun] > squares squarea1300 trying-square1579 mitre square1676 mitre1678 centre square1683 box square?1710 square rule1726 T square1785 set square1854 try-square1877 society > communication > representation > a plastic or graphic representation > graphic representation > drawing plans or diagrams > [noun] > drawing instruments sweep1680 bow1706 trammel1725 stock1815 cyclograph1823 trainer1848 set square1854 stereograph1877 tracer1878 philograph1892 society > communication > representation > a plastic or graphic representation > graphic representation > drawing plans or diagrams > [noun] > drawing instruments > triangular set square1854 triangle1875 1854 in Specif. Patents, Artists' Instr. (1872) 73 An improved artizans' tool, which may be used as a measuring rule, straight edge, set square, T square, bevel, and plumb rule. 1857 W. Binns Elem. Treat. Orthogr. Projection 1 One 8-inch set square. 1884 J. J. Holtzapffel Turning & Mech. Manip. V. 64 The sliderest is adjusted to it by means of the set square, an instrument with a straight shaft and a steel blade fixed to it at right angles. 1892 E. Rowe Hints on Chip-carving (1895) 15 The set-square of 45°. 1892 E. Rowe Hints on Chip-carving (1895) 7 The 60° set-square. < as lemmas |
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